package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.WebTask.WebSocketServer;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrdersService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service

public class OrdersServiceImpl implements OrdersService {
    private static final Integer REMINDER_FOR_INCOMING_ORDERS = 1;
    private static final Integer CUSTOMER_REMINDER = 2;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param dto
     * @return
     */
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO dto) {
        Long userId = BaseContext.getCurrentId();
        //构建订单表信息
        Orders orders = new Orders();
        BeanUtils.copyProperties(dto, orders);
        orders.setNumber(System.currentTimeMillis() + "");
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        //获取用户姓名
        User user = userMapper.getById(userId);
        if (user == null) {
            throw new OrderBusinessException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        orders.setUserName(user.getName());
        //获取地址信息
        AddressBook addressBook = addressBookMapper.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new OrderBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        orders.setConsignee(addressBook.getConsignee());
        //插入订单表
        ordersMapper.insert(orders);

        //构建订单详情表
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //插入订单详情表
        List<ShoppingCart> carts = shoppingCartMapper.getBy(shoppingCart);
        if (carts == null || carts.size() == 0) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        List<OrderDetail> orderDetails = new ArrayList<>();
        carts.forEach(cart -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        });
        orderDetailMapper.insert(orderDetails);
        //清空购物车
        shoppingCartMapper.delete(shoppingCart);
        //封装vo对象
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .build();
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        /*// 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
*/
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return new OrderPaymentVO();
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = ordersMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        ordersMapper.update(orders);

        Map map = new HashMap();
        map.put("type", REMINDER_FOR_INCOMING_ORDERS);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号为" + outTradeNo);
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 订单搜索
     *
     * @param dto
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Orders> page = ordersMapper.conditionSearch(dto);

        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        List<Orders> orders = ordersMapper.get();
        if (orders == null && orders.size() == 0) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Integer toBeConfirmed = 0; //2
        Integer deliveryInProgress = 0;  //4
        Integer confirmed = 0; //3
        for (Orders order : orders) {
            if (order.getStatus() == Orders.TO_BE_CONFIRMED) {
                toBeConfirmed++;
            }
            if (order.getStatus() == Orders.CONFIRMED) {
                confirmed++;
            }
            if (order.getStatus() == Orders.DELIVERY_IN_PROGRESS) {
                deliveryInProgress++;
            }
        }
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        OrderVO vo = new OrderVO();
        Orders order = ordersMapper.getById(id);
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        if (orderDetails == null || orderDetails.size() == 0) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        BeanUtils.copyProperties(order, vo);
        vo.setOrderDetailList(orderDetails);
        return vo;
    }

    /**
     * 接单
     *
     * @param orders
     */
    @Override
    public void confirm(Orders orders) {
        Orders order = ordersMapper.getById(orders.getId());
        orders.setStatus(Orders.CONFIRMED);
        ordersMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        ordersMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     * @return
     */
    @Override
    public void complete(Long id) {
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @param dto
     */
    @Override
    public void cancel(OrdersCancelDTO dto) {
        Orders order = new Orders();
        BeanUtils.copyProperties(dto, order);
        order.setCancelTime(LocalDateTime.now());
        order.setStatus(Orders.CANCELLED);
        order.setPayStatus(Orders.REFUND);
        ordersMapper.update(order);
    }

    /**
     * 拒单
     *
     * @param dto
     */
    @Override
    public void rejection(OrdersRejectionDTO dto) {
        Orders orders = new Orders();
        BeanUtils.copyProperties(dto, orders);
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 历史订单查询
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult page(Integer page, Integer pageSize, Integer status) {
        OrdersPageQueryDTO dto = new OrdersPageQueryDTO();
        dto.setUserId(BaseContext.getCurrentId());
        dto.setStatus(status);
        PageHelper.startPage(page, pageSize);
        Page<Orders> p = ordersMapper.conditionSearch(dto);
        List<OrderVO> list = new ArrayList();
        // 查询出订单明细，并封装入OrderVO进行响应
        if (p != null && p.getTotal() > 0) {
            for (Orders orders : p) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
            return new PageResult(p.getTotal(), list);
        }
        return null;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口 --由于没有可用的商户id，下面的退款操作执行会失败，直接注释即可，假设退款成功了，直接修改状态
            // weChatPayUtil.refund(
            //         ordersDB.getNumber(), //商户订单号
            //         ordersDB.getNumber(), //商户退款单号
            //         new BigDecimal(0.01),//退款金额，单位 元
            //         new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 用户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders order = ordersMapper.getById(id);
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map = new HashMap();
        map.put("type", CUSTOMER_REMINDER);
        map.put("orderId", id);
        map.put("content", "订单号为" + order.getNumber());
        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }
}
